Sound over HDMI fails in Fedora 24 Mate Spin on Odroid-Xu4

[Stewart Samuels]

Hello,

I do not seem to be able to get sound via my HDMI TV connection to the Odroid-Xu4.  Pulseaudio is running however.  What drivers are required for this and how do I check to see if they are a) installed; b) loaded.  Lsmod shows now snd modules running but I suspect this is because HDMI is being used.

Thanks for any help.

Stewart

[Stewart Samuels]

Ok.  Performing a "jounalctl -xb" reveals the following for the hdmi probe.

[root@myodroid exynos]# journalctl -xb
-- Logs begin at Thu 2016-02-11 11:28:00 EST, end at Sat 2016-08-13 
22:01:01 EDT. --
Feb 11 11:28:02 myodroid systemd-journald[180]: Runtime journal 
(/run/log/journal/) is 8.0M, max 98.9M, 90.9M free.
-- Subject: Disk space used by the journal
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel

[Stewart Samuels]

I have now got past the failures listed in my previous posting by using 
the following "append" line in /boot/extlinux/extlinux.conf.

append rd.driver.pre="exynosdrm ehci-exynos,ohci-exynosro" 
root=UUID=4d70d307-a61d-4cda-    9535-8a8849c262c2 cma=64M LANG=en_US.UTF-8

However, journalctl -xb shows the system is now failing with the 
following messages:

Feb 11 11:28:02 myodroid systemd-modules-load[178]: Failed to find 
module 'snd_bcm2835'
Feb 11 11:28:02 myodroid systemd[1]: Starting Setup Virtual Console...
Feb 11 11:28:02 myodroid systemd[1]: Starting dracut cmdline hook...
Feb 11 11:28:03 myodroid dracut-cmdline[189]: dracut-24 (Twenty Four) 
dracut-044-20.fc24
Feb 11 11:28:03 myodroid dracut-cmdline[189]: Using kernel command line 
parameters: rd.driver.pre="exynosdrm ehci-exynos,ohci-exynosro" 
root=UUID=4d70d307-a
Feb 11 11:28:03 myodroid systemd[1]: Started Journal Service.
Feb 11 11:28:03 myodroid audit[1]: SERVICE_START pid=1 uid=0 
auid=4294967295 ses=4294967295 subj=kernel msg='unit=systemd-journald 
comm="systemd" exe="/usr/
Feb 11 11:28:03 myodroid systemd[1]: systemd-modules-load.service: Main 
process exited, code=exited, status=1/FAILURE
Feb 11 11:28:03 myodroid systemd[1]: Failed to start Load Kernel Modules.
---------------------------------------------------------------------------------------------------------

So, where do I find the snd_bcm2835 module?  Is there an rpm for it?  
Will I have to rebuild the kernel?

Stewart

[Peter Robinson]

On Sun, Aug 14, 2016 at 6:38 PM, Stewart Samuels  wrote:
> I have now got past the failures listed in my previous posting by using the
> following "append" line in /boot/extlinux/extlinux.conf.
>     append rd.driver.pre="exynosdrm ehci-exynos,ohci-exynosro"
>
> root=UUID=4d70d307-a61d-4cda-    9535-8a8849c262c2 cma=64M LANG=en_US.UTF-8
>
> However, journalctl -xb shows the system is now failing with the following
> messages:
>
> Feb 11 11:28:02 myodroid systemd-modules-load[178]: Failed to find module
> 'snd_bcm2835'
> Feb 11 11:28:02 myodroid systemd[1]: Starting Setup Virtual Console...
> Feb 11 11:28:02 myodroid systemd[1]: Starting dracut cmdline hook...
> Feb 11 11:28:03 myodroid dracut-cmdline[189]: dracut-24 (Twenty Four)
> dracut-044-20.fc24
> Feb 11 11:28:03 myodroid dracut-cmdline[189]: Using kernel command line
> parameters: rd.driver.pre="exynosdrm ehci-exynos,ohci-exynosro"
> root=UUID=4d70d307-a
> Feb 11 11:28:03 myodroid systemd[1]: Started Journal Service.
> Feb 11 11:28:03 myodroid audit[1]: SERVICE_START pid=1 uid=0 auid=4294967295
> ses=4294967295 subj=kernel msg='unit=systemd-journald comm="systemd"
> exe="/usr/
> Feb 11 11:28:03 myodroid systemd[1]: systemd-modules-load.service: Main
> process exited, code=exited, status=1/FAILURE
> Feb 11 11:28:03 myodroid systemd[1]: Failed to start Load Kernel Modules.
>
> So, where do I find the snd_bcm2835 module?  Is there an rpm for it?  Will I
> have to rebuild the kernel?

Why would you want the sounds driver for the raspberry pi?

[Stewart Samuels]

Hi Peter,

I don't want the sound driver for the Raspberry PI.  The "snd_bcm2835" 
module is what Fedora 24 is trying to load (and fails) on my Odroid-Xu4 
(as shown in my "journalctl -xb" snippet that I posted).  What module 
should it be loading, if any, to use sound of hdmi to my TV?  I get no 
sound what so ever.

Stewart

[Peter Robinson]

On Sun, Aug 14, 2016 at 6:47 PM, Stewart Samuels  wrote:
> Hi Peter,
>
> I don't want the sound driver for the Raspberry PI.  The "snd_bcm2835"
> module is what Fedora 24 is trying to load (and fails) on my Odroid-Xu4 (as
> shown in my "journalctl -xb" snippet that I posted).  What module should it
> be loading, if any, to use sound of hdmi to my TV?  I get no sound what so
> ever.

TBH no idea, have you tried googling it? Looking at the device tree
there doesn't appear to be any audio bits for the XU4 as yet, there is
for the XU3 and XU3 Lite, but I'm not directly aware of the
differences between the 3 models, eg the XU4 could have a different
codec chip or something.

Peter

[Stewart Samuels]

Hello Peter,

After researching this for a bit, what I found is that the XU4 is 
suppose to be 100% software compatible with the XU3.  Does that suggest 
you should be able to use the audio bits for the XU3 with the XU4?  Are 
these audio bits software or hardware?

Stewart

[Peter Robinson]

On Fri, Sep 2, 2016 at 11:52 AM, Stewart Samuels  wrote:
> Hello Peter,
>
> After researching this for a bit, what I found is that the XU4 is suppose to
> be 100% software compatible with the XU3.  Does that suggest you should be
> able to use the audio bits for the XU3 with the XU4?  Are these audio bits
> software or hardware?

Hardware, there will be a codec chip, and probably something around
the hdmi and how it's all wired together.